Patent US4529856A successfully refreshed from Google Patents.
US4529856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic-glass-metal seal by microwave heating
Assignee: United States, DOE THE, Secretary of
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Filing: 1983-10-04
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Granted: 1985-07-16
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Expires: 2003-10-04
Abstract
Abstract A method for producing a ceramic-glass-metal seal by microwaving mixes a slurry of glass sealing material and coupling agent and applies same to ceramic and metal workpieces. The slurry and workpieces are then insulated and microwaved at a power, time and frequency sufficient to cause a liquid phase reaction in the slurry. The reaction of the glass sealing material forms a chemically different seal than that which would be formed by conventional heating because it is formed by diffusion rather than by wetting of the reactants.
Inventors
- 👤 Thomas T. Meek
- 👤 Rodger D. Blake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:14
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/025; C04B2235/00; C04B2235/65; C04B2235/66; C04B2235/667; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/405; C04B2237/406
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A method of producing a ceramic-glass-metal seal comprising the steps of: a. mixing a slurry of glass sealing material and coupling agent, applying said slurry to ceramic and metal workpieces for sealing, b. surrounding said slurry and ceramic and metal workpieces with an insulative material, c. microwaving said slurry and ceramic and metal workpieces at a power, time and frequency sufficient to cause a liquid phase reaction in said slurry, and d. allowing said slurry and ceramic and metal workpieces to cool, thereby securing a ceramic-glass-metal seal.
Claim 2
Independent Claim
87 words
A method of producing a ceramic-glass-metal seal comprising the steps of: a. mixing a slurry of glass sealing material and coupling agent, applying said slurry to ceramic and metal workpieces for sealing, b. surrounding said slurry and ceramic and metal workpieces with an insulative material, c. microwaving said slurry and ceramic and metal workpieces at a power, time and frequency sufficient to cause a liquid phase reaction in said slurry, and d. allowing said slurry and ceramic and metal workpieces to cool, thereby securing a ceramic-glass-metal seal.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said step of mixing comprises mixing a slurry of glass sealing material and organic coupling agent.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein said step of mixing comprises mixing a slurry of glass sealing material and water.
Claim 5
Dependent Claim
20 words
The method of claim 2 wherein said step of mixing comprises mixing a slurry of glass sealing material and oil.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein said step of mixing comprises mixing a slurry of glass sealing material and watch oil.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein said step of microwaving comprises microwaving at a frequency of about 2.5 gHz.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |